Implement and enable the audio sliders

It was about time

src/audio.cpp

@@ -71,6 +71,32 @@ Audio::~Audio()
     delete audioOutLock;
 }
 
+float Audio::getOutputVolume()
+{
+    return outputVolume;
+}
+
+void Audio::setOutputVolume(float volume)
+{
+    outputVolume = volume;
+    alSourcef(alMainSource, AL_GAIN, outputVolume);
+
+    for (const ToxGroupCall& call : Core::groupCalls)
+    {
+        if (!call.active)
+            continue;
+        for (ALuint source : call.alSources)
+            alSourcef(source, AL_GAIN, outputVolume);
+    }
+
+    for (const ToxCall& call : Core::calls)
+    {
+        if (!call.active)
+            continue;
+        alSourcef(call.alSource, AL_GAIN, outputVolume);
+    }
+}
+
 void Audio::suscribeInput()
 {
     if (!alInDev)

src/audio.h

@@ -45,6 +45,9 @@ class Audio : QObject
 public:
     static Audio& getInstance(); ///< Returns the singleton's instance. Will construct on first call.
 
+    static float getOutputVolume(); ///< Returns the current output volume, between 0 and 1
+    static void setOutputVolume(float volume); ///< The volume must be between 0 and 1
+
     static void suscribeInput(); ///< Call when you need to capture sound from the open input device.
     static void unsuscribeInput(); ///< Call once you don't need to capture on the open input device anymore.
 
@@ -75,12 +78,6 @@ public slots:
     void playGroupAudio(int group, int peer, const int16_t* data,
                         unsigned samples, uint8_t channels, unsigned sample_rate);
 
-public:
-    static QThread* audioThread;
-    static ALCcontext* alContext;
-    static ALuint alMainSource;
-    static float outputVolume;
-
 private:
     explicit Audio()=default;
     ~Audio();
@@ -91,6 +88,10 @@ private:
     static std::atomic<int> userCount;
     static ALCdevice* alOutDev, *alInDev;
     static QMutex* audioInLock, *audioOutLock;
+    static float outputVolume;
+    static ALuint alMainSource;
+    static QThread* audioThread;
+    static ALCcontext* alContext;
 };
 
 #endif // AUDIO_H

src/core/coreav.cpp

@@ -586,7 +586,7 @@ void Core::playAudioBuffer(ALuint alSource, const int16_t *data, int samples, un
 
     ALint state;
     alGetSourcei(alSource, AL_SOURCE_STATE, &state);
-    alSourcef(alSource, AL_GAIN, Audio::outputVolume);
+    alSourcef(alSource, AL_GAIN, Audio::getOutputVolume());
     if (state != AL_PLAYING)
     {
         alSourcePlay(alSource);

src/widget/form/settings/avform.cpp

@@ -54,8 +54,6 @@ AVForm::AVForm() :
     connect(bodyUI->rescanButton, &QPushButton::clicked, this, [=](){getAudioInDevices(); getAudioOutDevices();});
     bodyUI->playbackSlider->setValue(100);
     bodyUI->microphoneSlider->setValue(100);
-    bodyUI->playbackSlider->setEnabled(false);
-    bodyUI->microphoneSlider->setEnabled(false);
 
     for (QComboBox* cb : findChildren<QComboBox*>())
     {
@@ -285,13 +283,13 @@ void AVForm::on_ContrastSlider_valueChanged(int value)
 
 void AVForm::on_playbackSlider_valueChanged(int value)
 {
-    Audio::getInstance().outputVolume = value / 100.0;
+    Audio::setOutputVolume(value / 100.0);
     bodyUI->playbackMax->setText(QString::number(value));
 }
 
 void AVForm::on_microphoneSlider_valueChanged(int value)
 {
-    Audio::getInstance().outputVolume = value / 100.0;
+    Audio::setOutputVolume(value / 100.0);
     bodyUI->microphoneMax->setText(QString::number(value));
 }
 

src/widget/form/settings/avsettings.ui

@@ -75,6 +75,9 @@
              <string>Use slider to set volume of your microphone.
 WARNING: slider is not supposed to work yet.</string>
             </property>
+            <property name="maximum">
+             <number>100</number>
+            </property>
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
@@ -85,6 +88,9 @@ WARNING: slider is not supposed to work yet.</string>
             <property name="toolTip">
              <string>Use slider to set volume of your speakers.</string>
             </property>
+            <property name="maximum">
+             <number>100</number>
+            </property>
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>